臭氧氧化-三维电极电解联用技术深度处理造纸废水

Advanced treatment of papermaking wastewater by ozonation combined with three-dimensional electrode electrolysis

采用臭氧氧化-三维电极电解联用技术深度处理造纸废水,通过单因素及正交实验法确定了最优工艺条件,并探讨了反应的动力学和机理。实验结果表明:废水处理的最优工艺条件为电极间距1.5 cm、电流密度9mA/cm^2、臭氧曝气量15 mL/min、活性炭填充量22 g/L、反应时间60 min,该工艺条件下,废水的COD去除率达93.70%;臭氧氧化-三维电极电解联用技术对废水中COD的去除过程符合一级反应动力学方程;臭氧氧化和三维电极电解间存在协同效应。

Papermaking wastewater was further treated by the process of ozonation combined with three-dimensional electrode electrolysis. The optimum process conditions were confirmed by single factor experiments and orthogonal experiments. The reaction kinetics and mechanisms were discussed. The experimental results showed that： Under the optimum process conditions of electrode gap 1.5 cm, current density 9 mA/cm~, ozone aeration rate 15 mL/min, activated carbon filling amount 22 g/L and reaction time 60 min, the COD removal rate of the wastewater reached to 93.70%; The COD removal process fitted the first-order reaction kinetics equation ; There is a synergistic effect between ozonation and three-dimensional electrode electrolysis.